Hides code coverage "missing coverage" card element warnings from github pull requests

hideGithubCodeCoverage.js

// hides the code coverage boxes on gh file pr diff view.
// added this because it makes it difficult to read
const rule = '.check-annotation-warning { display: none; }'
const sheet = window.document.styleSheets[0];
sheet.insertRule(rule, sheet.cssRules.length);

// workaround to make snippet gloab fn
// can run hideCC() from console
window.hideCC = function (value) {
    const sheet = window.document.styleSheets[0];
    sheet.insertRule(rule, sheet.cssRules.length);
    console.log(`Added rule: ${rule}`)
};